While in the grand scheme of things, five seconds isn’t all that long, it’s longer than you may think. One common question received by the Vac-Con Service Department is “Why do the engine lights keep coming on in the chassis?” You may be surprised to learn that nearly 60 percent of all engine light problems result from an incomplete ECM system check.
Your next thought is most likely, “What is an ECM system check? And why does this happen?” The ECM (Engine Control Module) in the engine has to identify all of the sensors in the chassis; it has to look
